uuid

Pass UUID value as a parameter to the function

僤鯓⒐⒋嵵緔 提交于 2019-12-02 15:40:37
问题 I have the table with some columns: --table create table testz ( ID uuid, name text ); Note : I want to insert ID values by passing as a parameter to the function. Because I am generating the ID value in the front end by using uuid_generate_v4() . So I need to pass the generated value to the function to insert into the table My bad try: --function CREATE OR REPLACE FUNCTION testz ( p_id varchar(50), p_name text ) RETURNS VOID AS $BODY$ BEGIN INSERT INTO testz values(p_id,p_name); END; $BODY$

What kind of data can you extract from a UUID?

泄露秘密 提交于 2019-12-02 15:38:46
I know that we could easily extract the uuid version number. Is there a reliable way to extract information like timestamp, MAC address? Thanks! A standard-conforming UUID may be one of several variants, it looks like this: AAAAAAAA-BBBB-CCCC-DDDD-FFFFFFFFFFFF The first (hex)digit of the DDDD part determines the variant. If it is one of 8,9,A,B it is conforming to the current spec (0-7 are reserved for backward compatibility, C,D are reserved for Microsoft, and E,F are reserved for future use) If it conforms to the current spec, check the first digit of the CCCC part which determines the UUID

蓝牙BLE: 蓝牙4.0 BLE广播数据解析(转)

戏子无情 提交于 2019-12-02 15:38:04
BLE 设备工作的第一步就是向外广播数据。广播数据中带有设备相关的信息。本文主要说一下 BLE 的广播中的数据的规范以及广播包的解析。 1. 广播模式 BLE 中有两种角色 Central 和 Peripheral ,也就是中心设备和外围设备。中心设备可以主动连接外围设备,外围设备发送广播或者被中心设备连接。外围通过广播被中心设备发现,广播中带有外围设备自身的相关信息。 广播包有两种: 广播包 (Advertising Data)和 响应包 (Scan Response),其中广播包是每个设备必须广播的,而响应包是可选的。 数据包的格式如下图所示(图片来自官方 Spec): 每个包都是 31 字节,数据包中分为有效数据(significant)和无效数据(non-significant)两部分 有效数据部分 :包含若干个广播数据单元,称为 AD Structure 。如图中所示,AD Structure 的组成是:第一个字节是长度值 len,表示接下来的 len 个字节是数据部分。数据部分的第一个字节表示数据的类型 AD Type ,剩下的 Len - 1 个字节是真正的数据 AD data 。其中 AD type 非常关键,决定了 AD Data 的数据代表的是什么和怎么解析,这个在后面会详细讲; 无效数据部分 :因为广播包的长度必须是 31 个 byte,如果有效数据部分不到

vmware14克隆后UUID相同的解决方法

孤人 提交于 2019-12-02 15:35:19
查看网卡 UUID值 [root@localhost network-scripts]# nmcli connection show NAME UUID TYPE DEVICE ens33 cf228d3f-268a-4551-a90b-f1613aea929d ethernet ens33 查看网卡 MAC,发现原系统和克隆后的系统MAC值不一样 [root@localhost network-scripts]# nmcli device show ens33 GENERAL.DEVICE: ens33 GENERAL.TYPE: ethernet GENERAL.HWADDR: 00:0C:29:1F:AA:2D GENERAL.MTU: 1500 GENERAL.STATE: 100 (连接的) GENERAL.CONNECTION: ens33 GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/3 WIRED-PROPERTIES.CARRIER: 开 IP4.ADDRESS[1]: 192.168.112.129/24 IP4.GATEWAY: 192.168.112.2 IP4.ROUTE[1]: dst = 0.0.0.0/0, nh = 192.168.112.2, mt = 100

layui 数据表格+分页+搜索+checkbox+缓存选中项数据

安稳与你 提交于 2019-12-02 15:04:09
在做数据表格的时候遇到了很多坑, 今天整理一下方便以后使用.   主要功能是使用数据表格, 做分页,做搜索, 还有checkbox, 支持全选.   当选中一些数据的时候, 数据切换页面数据在切换回来后,选中状态就消失了, 我们希望切换回来的时候, 选中状态还能存在, 因此做了个缓存, 使checkbox 保持选中状态.代码如下: 1.HTML 搜索输入框 <form class="layui-form"> <div class="layui-input-inline"> <input type="tel" name="searContent" autocomplete="off" placeholder="姓名/手机/身份证" class="layui-input"> </div> </form> 2.HTML 搜索按钮 <div class="layui-input-inline " style="width: 90px"> <button class="layui-btn" id="searchEmailCompany" data-type="reload"> <i class="layui-icon" style="font-size: 20px; "></i> 搜索 </button> </div> 3.HTML table表格 <div class="yys

UUID工具类

最后都变了- 提交于 2019-12-02 14:58:36
import java.util.Arrays; import java.util.UUID; /** * UUID工具类 * UUID发生器 生成单个UUID或UUID组 * */ public class UUIDGenerator { /** * 定义UU64常量组 */ private static final char[] _UU64 = "*0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz".toCharArray(); /** * 定义UU16常量组 */ private static final char[] _UU16 = "0123456789abcdef".toCharArray(); /** * 默认空构造 */ public UUIDGenerator() { } /** * 生成原生的UUID对象 * @return UUID */ public static UUID createUUID() { return UUID.randomUUID(); } /** * 获得原生的UUID字符串 * @return UUID */ public static String getUUID() { return createUUID().toString(); } /** *

Should I implement auto-incrementing in MongoDB?

大城市里の小女人 提交于 2019-12-02 13:57:57
I'm making the switch to MongoDB from MySQL. A familiar architecture to me for a very basic users table would have auto-incrementing of the uid . See Mongo's own documentation for this use case . I'm wondering whether this is the best architectural decision. From a UX standpoint, I like having UIDs as external references, for example in shorter URLs: http://example.com/users/12345 Is there a third way? Someone in IRC Freenode's #mongodb suggested creating a range of IDs and caching them. I'm unsure of how to actually implement that, or whether there's another route I can go. I don't

hibernate5.HibernateSystemException: ids for this class must be manually assigned before calling sav

我与影子孤独终老i 提交于 2019-12-02 11:17:58
hibernate5 . HibernateSystemException : ids for this class must be manually assigned before calling save ( ) : 这错就是没理解清楚hibernate的主键生成策略。native,assigned以及uuid 第一种:native native为id自动生成策略,生成的是数字id,添加数据到mysql数据库时不需要设置id的值。 第二种:assigned assigned主键策略需要在添加数据时自己设置id,它不能自动生成id。 第三种:uuid 自动生成的一个32位的字符串 解决方案:把assigned改成uuid < id name = "id" type = "java.lang.String" > < column name = "id" length = "32" / > < generator class = "uuid" / > < / id > 来源: https://blog.csdn.net/qq_40448193/article/details/102754602

c++ 创建 uuid guid

假如想象 提交于 2019-12-02 10:54:25
如果没安装,先安装: [root@localhost]# yum install libuuid-devel #include "uuid/uuid.h" 引用 libuuid.so,即uuid .... uuid_t uu; uuid_generate(uu); char uuid_str[37]; uuid_unparse_lower(uu, uuid_str); printf("generate uuid=%s\n", uuid_str); .... 来源: https://www.cnblogs.com/nanfei/p/11742249.html

badly formed hexadecimal UUID error string for a UUID primary key

不问归期 提交于 2019-12-02 10:01:13
I'm trying to get my table to load, but am getting this error, most likely because my primary key is a uuid. Here is my url paths. path('results/', views.results, name='results'), path('results/<uuid:pk>/', views.genre_book, name='books_genre_table'), Here is my views.py If there is one observation, we load the price table. If not, then we load a table with service descriptions. The user can then pick the service they are most interested and click through to the price table for that service. This is not working. The first view "results" works, but the second view book_genre does not. def